Spring-head-pinning machine.



PATENTED :MAR. 22, 1904.

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'0. F. SHOEMAKER', DEGD} D. L. HOLWIOK. ADMINISTRATOR.

SPRING HEAD PINNINGY MACHINE.

APPLICATION FILED FEB. 14, 1903.,

NO MODEL.

UNITED STATES Patented March 22, 1904.

PATENT OEFIOE.

DANIEL L. HOLWICK, OF OANTON, OHIO, ADMINISTRATOR OE OHARLES E.SHOEMAKER, DEOEASED.

VSPRING-HEAD-PINNING MACHINE.

SPECIFICATION forming part of Letters Patent No. 755,005, dated March22, 1904.

Application filed February 14, 1903. Serial No. 143,354. (No model.)

spring; and the objects of the machine are to bring the parts togetherquickly, neatly, and

accurately without any bending or warping and to press the partstogether to hold them in proper relative position until the bolt isinserted. These objects are accomplished by the mechanism illustrated inthe accompanying drawings, in which Figure 1 is a perspective view ofthe entire machine; Fig. 2, a detached vertical section of theconverging plates; Fig. 3, a detached ver tical section of the centeringmechanism; Fig. 4, a detached perspective view of the scroll, ears, andbolt to be assembled to form'the head of the spring; Fig. 5, a detachedside view of the scroll entered part way. between the ears; Fig. 6, adetached view of the manner in which the scroll and'ears areapproximately centered, and Fig. 7 a detached side view of the headaccurately centered and ready for the bolt.

Similar numerals refer to similar parts throughout the drawings.

In the manufacture of springs the scroll 1 on the end of the lower part2 of the spring has usually been inserted by hand between the ears 3 and3 on the upper part 4 and brought into approximateposition by the strokeof a hammer, after which the parts have been centered by first driving acentering pin through the eye 5 of the ear 3 into the eye 6 of thescroll and then through the eye 5 of the ear 3 into the eye 6 of thescroll'on the other side of the spring. By this method of centeringfirst on one side and then on the other the scroll and the ears are bentor warped out of their true shape, and. furthermore, when the piniswithdrawn the ears are bent or pulled out and away from the scroll, and

to hold the parts together the bolt 7 must be inserted at once, and eventhen the cars do not join the scroll neatly or truly, because thepartsare out of shape.

On the table 8 of the machine are attached two converging blocks 9 sideby side and diverging from each other toward the side of the table. Onthe inner sides of the blocks 9 are attached the converging plates 10,which can be extended out beyond the side of the table, if desired; Theconverging plates are preferably located the thickness of the ear 3above the table, so the ears 3 and 3 can pass, respectively, under andabove the edges of the plates in event the ears are larger in diameterthan the scroll.

The scroll and the ears are preferably first brought to a red heat in aforge, and then the scroll is entered part way between the ears, asshown in Fig. 5. These parts are then thrust between the convergingplates 10, which operation brings the scroll and ears approximately to acenter, as shown in Fig. 6. The The approximately-centered head 11 isthen placed on the bed-plate 12, located on the table of the machineunder the presser-plate 13, with the eyes of the ears and scroll in linewith the centering-pin 14, as shown in Fig. 3. The presser-plate 13 isadjustably located a little farther above the bed-plate than the widthof the spring and, as illustrated, is guided by the two bolts 15, whichpass through the perforations 16 near its respective ends and extenddown into the bed-plate. The presser-plate can be moved vertically upand down these bolts, the upward movement being limited by theadjustable stop-nuts 17 and the downward movement being resisted by thecoil-springs 18, located around the bolts and resting on the adjustablenuts 19 on said bolts. The presser-plate is provided with the aperture20, located in line with the centering-pin 14:, which aperture ispreferably extended to the side of the plate to enable the operator tosee thehead of the spring when the same is placed under the plate. Thebed-plate 12 also is provided with an aperture 21, located in line withthe centering-pin. The apertures 20 and 21 are formed of a size toneatly receive the centering-pin, which passes through the former intothe latter in its operation. The centering-pin 14: is adjustablyattached in the socket 22 in the lower part of the threaded shank 23 bymeans of the setscrew 24, which is preferably located in the enlargedlower end or head 25 of said shank. The shank 23 is in turn attached inthe threaded socket 26 in the plunger 27, where it is held in any desired adjustment by the jam-nut 28. The plunger 27 is guided by and hasa vertical movement in the bearing 29, which in turn is attached to theframe 30 of the machine. The vertical movement is imparted to theplunger by the pitman 31, actuated by the crank 32 on the shaft 33, onwhich is the clutch cog-wheel 34. The clutch-wheel is turned by thecogpinion 35 on the shaft 36, on which shaft is also the driving-pulley37, to which power is communicated by the belt 38. The clutchwheel isthrown in whenever it is desired to operate the pinning mechanism bymeans of the pedal 39, the connecting-rod 40, and the clutch-lever 41.centered head is placed on the bed-plate under the presser-plate in linewith the centeringpin, as stated above, the machine is operated bydepressing the pedal 39, and the centeringpin descends through theaperture 20 of the compressing plate, respectively. into and through theeye 5 of the ear 3, the eye 6 of the scroll, and the eye 5 of the ear 3,and into the aperture 21 of the bed-plate. This operation brings theeyes of the ears and the scroll into line with each other,and at thesame time the head 25 of the shank 23 descends against the upper side ofthe presser-plate and depresses the plate against the upper side of thespring-head, as shown in broken lines in Fig. 3. The centering-pin is soadjusted in the shank 23 and the shank is so adjusted in the plunger 27that the presser-plate comes against the head of the spring immediatelyafter the parts thereof are accurately alined by the centering-pin andwith suflicient force to straighten the eyes and scroll in event theyare not in true shape and also to press them closely together, so theywill retain their proper relative posi- When the approximately tionafter the centering-pin is withdrawn and until the bolt is inserted. Asthe centeringpin ascends it carries with it the head of the spring,together with the presser-plate, until the plate strikes the stop-nuts17. The further ascent of the centering-pin draws it out of the eye 42of the head of the spring; but as the head is squarely against the lowerside of the presser-plate there is no bending or warping or deranging ofany of the parts of the spring in this operation. The head of the springis then ready for the insertion of the bolt, with all the parts in trueshape and position, and by reason of the pressure to which it has beensubjected will not come apart from the shocks of ordinary handling incase the bolt is not inserted at once. When the bolt is inserted,thereis thus completed a true, neat, and close joint. A centering-pin of thesame diameter as the spring-head bolt is used, so

that the eye of the head is shaped to closely fit the bolt.

The converging blocks and plates for approximately centering thespring-head, which are illustrated and described, but not claimedherein, will be made the subject of another application for LettersPatent.

What I claim as the invention of said CHARLES F. SHOEMAKER, and desireto secure by Letters Patent, is

A spring-head-centering machine comprising a bed-plate, an adjacentspring -held presser-plate having an aperture therein,stops limiting thedeparture of one plate from the other, a centeringpin adapted to operatethrough the presser-plate aperture toward and from the bed-plate, and apresser-head adapted to thrust the presser-plate toward the bedplate, ator near the completion of the pinstroke.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

DANIEL L. HOLWICK, Administrator of the estate of OIMV/l F.

Shoemaker, deceased. Witnesses:

HARRY FREASE, ELsIE MALLORY.

